has been done 与had been done要怎么用啊

has been done 与had been done要怎么用啊 Much___to fight against pollution.A.have been done B,has been done C,had been done D.has done为什么是选B? has been done,had been done 的区别是什么? I think I have tried my best.All that can be done ___.A.has done B.has been done C.had done D.had been done为什么选B不选D I think have tried my best.All that can be done ___ .A.has done B.has been done C.had done D.had been done为什么选B what had been done had been done. (1)I'm looking forward to your_______ partyA:birthday's B:birthdays' C:birthday D:birthdays(2)Much______to fight against pollutionA:have been done B:has been done C:had done D:has done is done,was done的被动语态是?is being done,was being done,has been done,had been done,will be done的被动语态是? 来一位高手辨析一下这个英语区别has done had done has been done had been done 区别是什么如何翻译? What ____ with the clothes?A.has been done B.has done C.have done D.have been done Much ______ been said about the problem but nothing ______ been done so far.A．has,had B．has,has C．had,had D．have,have Much ______ been said about the problem but nothing ______ been done so far.A．has,had B．has,has C．had,had D．have,have把这句话翻译一下. 1.be done和have/has/had been done之间区别!请举例!2.表转折时while与but用法区别最好举例 has/had been gone和has had been done的区别是什么啊 我要疯了.做题总错 had been done与had done是什么结构 他们的用法是什么 ----Has Tom finished his home work yet?----I have no idea;he[ ] it this morning.A.was doing B.had been doing C.had done D.did 19.All that can be done .　　A.have been done B.have done C.has been done D.has done顺便,翻译一下这句话吧 A lot __to save the old man's lifeA have been done B has been done